The First International is an alternate name for the International Workingmen's Association, an international organisation of left-wing radicals founded in 1864.

First International may also refer to:

• IWA–AIT or International Workers' Association, an anarcho-syndicalist federation of trade unions founded in 1922
• First International Syndicalist Congress, a meeting of European and Latin American syndicalists in London in 1913
• First International Conference of American States
• First International Eugenics Conference, a conference of eugenicists in London in 1912.
• International Peace Congress, an 1848 peace convention
• Aramaic Music Festival, also known as the "First International Aramaic Music Festival"

In business:

• First International Computer, a Taiwanese computer company
• First International Telecom, a Taiwanese mobile phone operator

In religion:

• First International Congress on World Evangelization
• International Bahá'í Council

In banking:

• First International Bank, an American bank founded in 1910
• First International Bank of Israel, an Israeli bank founded in 1972
  • First International Bank Tower, the building which houses the Israeli bank